Effects of meridional variation on steady-state visual evoked potentials

May, Julian; Cullen, John K.; Moskowitz-Cook, Anne; Siegfried, John B.

doi:10.1016/0042-6989(79)90213-x

Cited by 21 publications

(11 citation statements)

References 18 publications

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“…Angular patterns elicit a larger response than do straight-line patterns (Moskowitz et al, 1974;Wu, Ito, Kuwabara, Sugata, & Kida, 1994). An oblique effect in the angular patterns might exist, as was demonstrated for grating patterns (Frost & Kaminer, 1975;Maffei & Campbell, 1970;May & Cullen, 1979;Yoshida et al, 1975). From these findings, it is predicted that the diamond evokes a larger response than the square, because the angular parts of the diamond are located in the horizontal and vertical directions from its center, while those of the square are positioned obliquely.…”

Section: Discussionmentioning

confidence: 73%

“…Concerning the effect of spatial orientation upon VEPs, several studies have confirmed the "oblique effect", mainly using grating patterns (Frost & Kaminer, 1975;Maffei & Campbell, 1970;May & Cullen, 1979;Yoshida, Iwahara, & Nagamura, 1975). Appelle (1972) referred to the effect as "a small but consistent superiority in performance when visual stimuli are horizontal or vertical, as opposed to oblique" (p. 266).…”

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confidence: 99%

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Visual Evoked Potentials to Geometric Forms: Effects of Spatial Orientation

Ito

Sugata²,

Kuwabara

1997

Jpn Psychol Res

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Five outlined geometric figures of equal contour length were presented monocularly below the fixation point (FP); an upright equilateral triangle (upright triangle), an inverted equilateral triangle (inverted triangle), an upright square (square), a 45°‐tilted square (diamond) and a circle. The angular separation between FP and the top of the figures was held constant. Transient visual evoked potentials (VEPs) were recorded monopolarly from inion, 4, 7, 10 cm above it (l, l4, l7, l10) and Cz for ten subjects. The grand‐averaged subtracted waves were obtained between the figure and blank (control) conditions. N1 (mean peak latency: 155 ms) and P2 (240 ms) waves were identified. ANOVAs were conducted for the latency and amplitude values. Main results were as follows: On the N1 amplitude at l4 and l, the upright triangle, inverted triangle and diamond figures evoked significantly larger responses than did the square and the circle. However, no significant difference was found among the former three figures. These findings on the N1 amplitude suggest that the effect of a triangle is orientation‐free and that of a square is orientation‐bound.

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Section: Discussionmentioning

confidence: 73%

mentioning

confidence: 99%

Visual Evoked Potentials to Geometric Forms: Effects of Spatial Orientation

Ito

Sugata²,

Kuwabara

1997

Jpn Psychol Res

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“…Regan described a technique of using a stenopaic slit in measuring astigmatic powers from the VEP amplitude [9]. However, others have found that latency but not amplitude is sensitive to astigmatic errors and significant effects are only seen in the horizontal and vertical meridians [5,13]. We are investigating the feasibility of using a meridional stimulus pattern and stenopaic slit in measuring astigmatic errors with a SD t-VEP system.…”

Section: Discussionmentioning

confidence: 98%

Short-duration transient visual evoked potential for objective measurement of refractive errors

et al. 2011

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This study examined effects of uncorrected refractive errors (RE) in a short-duration transient visual evoked potential (SD t-VEP) system and investigated their role for objective measurement of RE. Refractive errors were induced by means of trial lenses in 35 emmetropic subjects. A synchronized single-channel EEG was recorded for emmetropia, and each simulated refractive state to generate 21 VEP responses for each subject. P100 amplitude (N75 trough to P100 peak) and latency were identified by an automated post-signal processing algorithm. Induced hypermetropia and myopia correlated strongly with both P100 amplitude and latency. To minimize the effect of baseline shift and waveform fluctuations, a VEP scoring system, based on software-derived P100 latency, amplitude and waveform quality, was used to estimate the RE. Using the VEP scores, a single VEP response had a high sensitivity and specificity for discerning emmetropia, small RE (<2 diopter) within a 2 diopter range and large RE (2-14 diopter) within a 4 diopter range. The VEP scoring system has a potential for objective screening of RE and for a more accurate 3-step objective refraction.

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“…Using event-related potentials (ERP) unequal responses have been obtained to cardinal and oblique orientations in steady state potentials (Maffei and Campbell, 1970; May et al, 1979; Skrandies, 1984; Moskowitz and Sokol, 1985); transient ERPs (Yoshida et al, 1975; Arakawa et al, 2000; Proverbio et al, 2002), and MEG (Koelewijn et al, 2011). …”

Section: Introductionmentioning

confidence: 99%

Oblique effect in visual mismatch negativity

Takács

Sulykos

Czigler

et al. 2013

Front. Hum. Neurosci.

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We investigated whether visual orientation anisotropies (known as oblique effect) exist in non-attended visual changes using event-related potentials (ERP). We recorded visual mismatch negativity (vMMN) which signals violation of sequential regularities. In the visual periphery unattended, task-irrelevant Gábor patches were displayed in an oddball sequence while subjects performed a tracking task in the central field. A moderate change (50°) in the orientation of stimuli revealed no consistent change-related components. However, we found orientation-related differences around 170 ms in occipito-temporal areas in the amplitude of the ERPs evoked by standard stimuli. In a supplementary experiment we determined the amount of orientation difference that is needed for change detection in an active, attended paradigm. Results exhibited the classical oblique effect; subjects detected 10° deviations from cardinal directions, while threshold from oblique directions was 17°. These results provide evidence that perception of change could be accomplished at significantly smaller thresholds, than what elicits vMMN. In Experiment 2 we increased the orientation change to 90°. Deviant-minus-standard difference was negative in occipito-parietal areas, between 120 and 200 ms after stimulus onset. VMMNs to changes from cardinal angles were larger and more sustained than vMMNs evoked by changes from oblique angles. Changes from cardinal orientations represent a more detectable signal for the automatic change detection system than changes from oblique angles, thus increased vMMN to these “larger” deviances might be considered a variant of the magnitude of deviance effect rarely observed in vMMN studies.

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Effects of meridional variation on steady-state visual evoked potentials

Cited by 21 publications

References 18 publications

Visual Evoked Potentials to Geometric Forms: Effects of Spatial Orientation

Visual Evoked Potentials to Geometric Forms: Effects of Spatial Orientation

Short-duration transient visual evoked potential for objective measurement of refractive errors

Oblique effect in visual mismatch negativity

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